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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4789dfe6b125df82449157afd40c2f99ecf320c4ff3dc2cc317955f864c65065' 
  AND token = '4DKYM4hTDQFOc/0gYLZDcZHtBSPQOuI2h1Hb2MKXcHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}